Do NOT reuse the oil cooler!!! If you have a rod knock, you have spun a bearing; and there will be metal flakes in your oil. Absolutely do not reuse any of the oil cooler parts! (You can reuse the brackets) That oil cooler has metal in it and when you install the “new” engine you will introduce the metal from the old engine to the new engine. I just had a replacement engine come into the machine shop I work at, that didn’t have the oil cooler replaced and it trashed the engine to the point where it couldn’t be rebuilt.
